over and over again (idiom)
三 · 3 strokes
Three horizontal strokes, representing the number three.
番 · 12 strokes
Depicts an animal's claw (釆) with their paw shown. 釆 also represents the sound. Based on the original meaning "animal's paw", now written as 蹯. The current meaning is a phonetic loan.
五 · 4 strokes
Origin unclear. Originally an X-shape.
次 · 6 strokes
The 二 (two) component represents the meaning "second" and also indicates the sound. The 欠 (deficient) represents the meaning "secondary" or "substandard".
我三番五次提醒他带钥匙，结果他还是忘了。
He came to bother me time and time again.